Study on Numerical Simulation of Construction Processing for No.1 Shaft of Weihe Tunnel

2014 ◽  
Vol 638-640 ◽  
pp. 837-841
Author(s):  
Yu Suo Wang ◽  
Yu Sen Lin ◽  
Gao Fei Feng ◽  
Ti Ding ◽  
Chao Yang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Lateral Displacement ◽  
Maximum Tensile Stress ◽  
Maximum Pressure ◽  
Two Dimensional ◽  
Coulomb Model ◽  
The Finite Difference Method ◽  
Pressure Stress ◽  
Maximum Lateral Displacement

In order to analyze the construction processing for No.1 shaft of Weihe Tunnel on Baoji-Lanzhou Passenger-dedicated Railway, a two-dimensional numerical model for the simulation of the shaft was built with the finite difference method. Mohr-Coulomb model was chosen as the soil constitutive model. The result shows that the maximum lateral displacement appears at the upper part of the shaft, and the lateral displacement is in effective constraint at the shaft’s bottom. After the construction, the maximum uplift at the shaft’s bottom is in the center, while the uplift decreases from the shaft’s center to its both sides. The maximum pressure stress turns up at the bottom sides of the shaft, and the maximum tensile stress appears at the middle of the shaft.

scholarly journals NUMERICAL SIMULATION OF 1964 TSUNAMI ACROSS THE PACIFIC OCEAN

1986 ◽  
Vol 1 (20) ◽  
pp. 5
Author(s):  
Michael H. Chen
Keyword(s):  
Numerical Simulation ◽  
Boundary Condition ◽  
Numerical Model ◽  
Pacific Ocean ◽  
Arrival Time ◽  
Two Dimensional ◽  
Open Sea ◽  
The Pacific ◽  
The Pacific Ocean

A two dimensional numerical longwave model using an appropriate open sea boundary condition has been developed. The use of the open-sea boundary condition makes it possible to simulate longwave propagation using a smaller region without covering the entire ocean. The numerical model is used to predict the arrival time of tsunamis resulting from the 1964 Alaskan earthquake at various stations with reasonable success.

scholarly journals Two-dimensional Simulation of Motion of Red Blood Cells with Deterministic Lateral Displacement Devices

Micromachines ◽  
2019 ◽  
Vol 10 (6) ◽  
pp. 393 ◽  
Author(s):  
Yanying Jiao ◽  
Yongqing He ◽  
Feng Jiao
Keyword(s):  
Numerical Simulation ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Lateral Displacement ◽  
Two Dimensional ◽  
Deterministic Lateral Displacement ◽  
Pillar Array ◽  
Displacement Mode ◽  
Pillar Diameter ◽  
Dimensional Simulation

Deterministic lateral displacement (DLD) technology has great potential for the separation, enrichment, and sorting of red blood cells (RBCs). This paper presents a numerical simulation of the motion of RBCs using DLD devices with different pillar shapes and gap configurations. We studied the effect of the pillar shape, row shift, and pillar diameter on the performance of RBC separation. The numerical results show that the RBCs enter “displacement mode” under conditions of low row-shift (∆λ < 1.4 µm) and “zigzag mode” with large row shift (∆λ > 1.5 µm). RBCs can pass the pillar array when the size of the pillar (d > 6 µm) is larger than the cell size. We show that these conclusions can be helpful for the design of a reliable DLD microfluidic device for the separation of RBCs.

Finite Element Numerical Simulation of Two-Dimensional Ground Water Solute Migration Question

2011 ◽  
Vol 301-303 ◽  
pp. 352-356 ◽  
Author(s):  
Meng Ling Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Numerical Model ◽  
Solute Transport ◽  
Ground Water ◽  
Calculated Result ◽  
Two Dimensional ◽  
Finite Element Numerical Simulation ◽  
Good Agreement

The finite element numerical model of 2-D solute transport in ground water with variable was established under the condition of variety of the velocity of the movement of water is not too fast,and was carried on by the finite element numerical simulation method.the numerical simulation shows that the calculated result is in good agreement with the experiment result.

A Research on the Characteristics of Lightning in Hailstorms of Beijing Area by the Method of Analysis the Lightning Detection Data and Numerical Simulation

2013 ◽  
Vol 416-417 ◽  
pp. 1993-1996
Author(s):  
Chuang Chuang Zhang ◽  
Ming Ma
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Two Dimensional ◽  
Beijing Area ◽  
Variation Trend ◽  
Lightning Detection ◽  
The Mean ◽  
Total Lightning ◽  
The Relationship ◽  
Cg Lightning

In this paper, by using lightning detection material of Beijing area, we analyzing the characteristics of lightning in four hailstorms. The results show that the mean percentage of cloud-to-ground (CG) lightning accounting for the total lightning is 8.28%, which is lower than the normal thunderstorms. On the contrary, the CG lightning has a higher proportion of positive CG than the normal thunderstorms. All cases variation trend of lightning frequency show a conspicuous intensive increase before the hail reaches the ground. The peak lightning frequency usually occurs 5 to 80min earlier than hailstone falling. These characteristics may have contribution to the forecasting of hailstorms of Beijing area. Another work was done by using a two-dimensional numerical model which includes dynamic, microphysics, electrification and discharge to simulate these four instances. The results present similar characteristics with the actual detection data. This will lay a foundation for the continuing studies of the relationship between hailstorm and lightning and the inherent reason of the relationship by using the method of numerical simulation.

scholarly journals Sand Bar Evolution Process Numerical Simulation Analyze Based on two Dimensional Numerical Model

2021 ◽  
Vol 1885 (5) ◽  
pp. 052047
Author(s):  
Caodong Jiang ◽  
Liangchao Ma ◽  
Dongfeng Li ◽  
Hongwu Zhang ◽  
Zihao Li
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Evolution Process ◽  
Two Dimensional ◽  
Sand Bar

Numerical Simulation of Moored Ship in Level Ice

2011 ◽  
Author(s):  
Li Zhou ◽  
Biao Su ◽  
Kaj Riska ◽  
Torgeir Moan
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Relative Motion ◽  
Parameter Sensitivity ◽  
Two Dimensional ◽  
Ice Drift ◽  
Sensitivity Studies ◽  
Level Ice ◽  
Ice Forces ◽  
Ice Resistance

The dynamic ice forces on a moored icebreaking tanker induced by drifting level ice were simulated with a two dimensional numerical model. Based on a heading controller which aimed to keep the hull head towards the drifting ice, ice resistance on ship was mainly estimated when taking the relative motion between the hull and ice into account. The mooring force and responses of the moored vessel were also looked into through parameter sensitivity studies with different ice thicknesses and ice drift speeds.

scholarly journals ANALYSIS OF WAVE RUN UP DYNAMICS AT JOGEHAMA BEACH JAPAN

2018 ◽  
pp. 68
Author(s):  
Naoyuki Inukai ◽  
Masaya Shinohara ◽  
Tokimitsu Ochiai ◽  
Hiroshi Yamamoto
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Two Dimensional ◽  
Wave Condition ◽  
Wave Dynamics ◽  
Geographic Feature ◽  
Wave Heights ◽  
Aerial Vehicle ◽  
Significant Wave Heights ◽  
Run Up

The big wave suddenly arrived at the beach, Niigata prefecture Japan in May 2014. And three children were carried off to the sea by the wave, though they played on the beach. When the accident occurred, the significant wave heights was 1.2m, and the wave period was 7.9 seconds. The beach characteristic topography has the cusp topography and steep slope. We tried to understand the reason why this accident occurred. Firstly, we reproduced the wave condition when the accident occurred. Secondary, we made the survey to understand the geographic feature of the beach. After the survey, we obtained the geographic data for the numerical simulation from the aerial photograph which were taken by UAV (Unmanned aerial vehicle). Finally, we comprehended the wave dynamics on the beach by the numerical simulation. We simulated the wave dynamics by the horizontal two dimensional numerical model and the vertical two dimensional numerical model.

NUMERICAL MODEL TO SIMULATE THE EROSION ON THE SLOPE DUE TO OVERTOPPING

2010 ◽  
Vol 13 (3) ◽  
pp. 78-87
Author(s):  
Hoai Cong Huynh
Keyword(s):  
Numerical Model ◽  
Flow Model ◽  
Bed Load ◽  
Experiment Data ◽  
Step Method ◽  
Morphological Model ◽  
Load Transport ◽  
Bed Load Transport ◽  
The Finite Difference Method ◽  
Good Agreement

The numerical model is developed consisting of a 1D flow model and the morphological model to simulate the erosion due to the water overtopping. The step method is applied to solve the water surface on the slope and the finite difference method of the modified Lax Scheme is applied for bed change equation. The Meyer-Peter and Muller formulae is used to determine the bed load transport rate. The model is calibrated and verified based on the data in experiment. It is found that the computed results and experiment data are good agreement.

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